package com.zhao.blog.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author xiaoZhao
 * @date 2021/12/27
 * @describe
 */
public class MD5Util {

    /*
     * @author xiaoZhao
     * @date 2021/12/27 19:37
     * @param [str]
     * @return java.lang.String
     * MD5加密
     **/
    public static String code(String str) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] byteDigest = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < byteDigest.length; offset++) {
                i = byteDigest[offset];
                if (i < 0) {
                    i += 256;
                }
                if (i < 16) {
                    buf.append("0");
                }
                buf.append(Integer.toHexString(i));
            }
            //32位加密
            return buf.toString();
            // 16位的加密
            //return buf.toString().substring(8, 24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        System.out.println(code("123456"));
    }
}
